package net.lainiao;

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.barriers.DistributedDoubleBarrier;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.curator.test.TestingServer;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

/**
 * Created by Administrator on 2016/11/8.
 */
public class DistributedBarrierExample2 {
    private static final int QTY=5;
    private static final String PATH="/DistributedBarrierExample2/barrier";

    public static void main(String[] args) throws Exception {
        try(TestingServer server=new TestingServer()){
            CuratorFramework client= CuratorFrameworkFactory.newClient(server.getConnectString(),new ExponentialBackoffRetry(1000,3));
            client.start();
            ExecutorService service= Executors.newFixedThreadPool(QTY);
            for (int i = 0; i < QTY; i++) {
                final DistributedDoubleBarrier barrier=new DistributedDoubleBarrier(client,PATH,QTY);
                final int index=i;
                Callable<Void> task=new Callable<Void>() {
                    @Override
                    public Void call() throws Exception {
                        Thread.sleep((long)(3* Math.random()));
                        System.out.println("Client #"+index+" enters");
                        barrier.enter();
                        System.out.println("Client #"+index+" begins");
                        Thread.sleep((long)(3000*Math.random()));
                        barrier.leave();
                        System.out.println("Client #"+index+" leave");
                        return null;
                    }
                };
                service.submit(task);
            }
            service.shutdown();
            service.awaitTermination(10, TimeUnit.MINUTES);
        }
    }
}
